Malicious PDF — malware analysis report

Static analysis result for SHA-256 d910081cdc1c0659…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 11:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6b5f4b6ca1ea2aa9106aeaf0ca2632c6 SHA-1: ddb3a676e4f413db13e8c3d1ba5d8933b3467e2e SHA-256: d910081cdc1c0659ea9a6787f59f7cde8339e6343e2f1dff91bde5646e3d04f2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/free-vpn-for-minecraft-game-hack PDF link annotation
    • https://hotelyetihome.com/userfiles/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-no-veracation_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/can-we-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-free-money-jailbreak_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E00 22980 bytes
SHA-256: cc08e0654e1a791e0ae4e9c07211e0ee5a881577b61c40dd62162e60396ce8ef
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 18308 bytes
SHA-256: 6047db928a8352707eb03a3f86faaa23b81a2ba1dc8a66055a15f32f19a2db03

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